Phonograph



J. A. DAVIDOWSKI.

' PHONOGRAPH.

. APPLICATION mp0 JULY 29, 1918. 1,372,167.

4 SHEETS-SHEET l.

Patented Mar. 22, 1921.

INVENTOR. 1o 27 1 50 JbsepMJauziowmZa' Jul f ATTORNEY.

J. A. DAVIDOWSKI.

PHONOGRAPH. APPLICATION FILED JULY 29, 1918- 1,372, 1 67. Patented Mar. 22, 1921.

4 SHEETSSHEET 2.

.l. A. DAVIDOWSKI.

PHONOGRAPH.

APPLICATION HLED JULY 29, 1918.

1,372,167. I Patented Mar. 22,1921.

4 SHEETS-SHEET 3.

151 if 8} 4 km k ATTORNEY.

PATENT OFFICE.

JOSEPH A. DAVIDOWSKI, OF BROOKLYN, NE YORK.

PHONOQRAPH.

Specification of Letters Patent. Patented llal'. 22, 1921.

Application filed July 29, 1918. Serial No. 247,127.

To all whom it may concern:

Be it known that I, JOSEPH A. DAvinow- SKI, a citizen of Russia, residing at Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Phonographs, of which the following is a specification.

This invention relates to improvements in phonographs, especially of the Victor type, and particularly to means for returning the goose neck tone arm and needle at the end of the record, and resetting the same preparatory to replaying. n

The principal object of the invention 18 to provide .an automatic means for playing phonographs using fiat disk records.

A further object is to provide a brush to .remove accumulation of dust in the record grooves in advance of the needle.

These and other like objects are attained by the novel construction and combination ofjparts hereinafter described and in the accompanying drawings, forming a material part of thisspecificatio'n, and in which Figure 1 is a top plan view of a conventional form of phonograph, indicating the application of the invention.

Fig. 2 is a fragmentary sectional view, taken on line 22 of Fig. 1.

Fig. 3 is a plan view of the actuating mechanism shown in one' of its positions.

Fig. 4 is a fragmentary plan view show ing the operating arm in another position. Fig. 5 is a plan view similar to Fig. 3,

showing the arm in a different position.

Fig. 6 is another plan view of the mechanism drawn to an enlarged scale.

Fig. 7 is a perspective view of the horn support.

Fig. 8 is a plan view of the control sector.

Fig. 9 is a front elevational view of the same, and

Figs. 10, 11 and 12 are plan views showing the operating parts in their different positions.

In drawings the numeral 15, designates the top, or upper member of the phonograph casing, through which at the rear, extends the swivel arm 16, car ing at its front end the sound box 17, to w ich needle 18 is at- .tached.

In the center of the casing, is a driving spindle 20 operatively engaging the hub 21 of the record support plate 22, on which the record 23. operatesby means of transverse pins, the-entire construction, as described, being of ordinary conventional type.

Engageable with the hub 21, of the plate 22, is a collar 28 heldin adjustment by a set screw 27, the collar having upon its lower end a ring 29, held by rivets 30 or similar fastenings and engaged between the flanged upper portion of the collar 28 and the ring 29, is a flat plate 32, to which the operative parts are attached.

The upper portion of the collar 28 is formed with a cam 34 terminating in a recess 35 in which is pivoted a dog 36, normally held against the front inclined surface of the recess 35, by the bent spring 37.

Pivoted to the plate 32, by the pin 40, is a lever 41 extending closely adjacent to the ring 28 and provided with a curved side 42 against which the cam 34 makes con tact when rotated.

A guide clip 43 is provided near the front end of the lever to hold it in close relation to the upper surface of the plate. An extending angular arm 45 is formed with the lever 41, the same having pivoted upon its surface a pawl 46, provided at one end with the detent 47, and has at the front end a finger 48, the pawl being held in normal operative position by the spring 49. Also carried by the lever 41, near the arm 45, is a pin 50, engageable with the forked end of a lever 51, pivoted on the pin 52 to the plate 32' and provided at its outer extremity 53 with a beveled lower surface.

Another lever 55 pivoted by the pin 56 to the plate 32,- is arranged adjacent to the ring 28, and is provided witha curved face 57 engageable with the cam 34 when the latter is rotated, and pivoted to the lever 55 is a dog 59, held normally against lever 51 by the spring 60, the main lever 55 being held in operative position by spring 61.

Engageable with a projection 59, formed at the side of-the dog 59, is a pawl 63 pivoted to the plate 32 and held normally in engagement by a spring 64. The main actuating lever 66 is pivoted by the pin 67 to the plate 32, the lever having an offset outer portion 68 terminating in an arm 70 having on its inner' side one or more shoulders 71, contactable with the end 72 of the lever 55 under certain conditions which will be herewith. a stop 73, engageable by a dog 74', actuated by the spring 77 and pivotedby the pin 75 to the plate 32, on which is a raised stop 76 limiting the action of the arm 70. Passing over the pawl 7 1 is a lever 78 pivoted at its end by the pin 79 to the plate 32 and having an angularly turned front portion 80, and pivoted to the lever 78, by the 'which the finger 93 of the lever 7 4 is normally engaged. i

A projection 95 of the arm 91 enters a recess 96 in the arm 80 for purposes further on apparent.

The long arm 98 of the bell-crank lever has an enlargement 99 containin a recess 100, and has pivoted to it anotherbell-crank lever, its short end 102 beingturned down and contactable with. the end 53 of the lever 51. A continuation 105 of the lever has a stop 106 adapted to limit the movement irr ward of the longer arm 107, of the bellcrank lever, which is pivoted on a pin 108 to the enlargement 99 of the lever arm 98.

Another bell-crank lever, pivoted on a pin 110, has a short arm 111 provided with a lug 112 enterable into the recess 100, of the enlargement 99, its long arm 114 having a lug 115 at its end, and is pressed outwardly by the spring 116, so as to bring the lug into contact with one end 118 of a straight lever 119, pivoted to the plate 32 by the pin 120, and connecting between the lever 119 and pawl 63 is a thin wire 122 causing the pawl to be retracted when the lever is operated.

A star wheel having a plurality of projections 125 is rotatable on the pin 126, and superposed on the star wheel is a ratchet 128, held against reverse rotation by a pawl pivoted to the plate 32. This ratchet is rotatable by contact with the end of an arm 136 drawn into engagement by the spring 137 and actuated; due to its pivoted connections with the lever 11, as is also the star wheel therebelow, when the lever is moved by the cam 34 against the spring 39.

Held pivotally by the pin 140, to the plate 32, is a bent lever 141. connected by a thin wire 142, with one of the arms of the lever 84- so as to draw the latter clear of the detent 47 at certain times, each action being communicated to the lever by contact of the projection 125 with the terminal 14-4 formed at the opposite end of the lever 1 11.

At one extremity of the plate 32, pivoted on the pin 148, is a catch having one extending limb 151 and a vertical limb 152,

aerate? the catch being held extended normally out ward by the spring 153.

A hollow sector shaped casing is formed of sheet metal, presenting an open space 161 in its inner, concave side and formed through the top are elongated slots 162 and 163, in the latter of which is a clamp screw having a knurled operating head 164 and index 165 registerable with graduation 166, the screw carrying a down-turned, outwardly extending finger 167 engageable with the finger 107.

In the other slot 162, is a like screw, having a head 170 and index 171, registerable with the graduations 172, the screw carrying an adjustable spring clip device 17d engageable with the finger 151.

This sector is screwed on the plate 15 concentric with, and spaced from, the disk.

carrying plate 22, as can best be seen in Fig. 1.

Engageable with the swivel tone'arm 16, is a band clamped by the screw 181, passing through an extending ear 182, and extending down from the band is a rigid projection 185, having pivoted to it, by the pin 186, a lever 188, pivoted in turn to the lower end of a twisted link 189, engaged pivotally with the outer end of a rod 190, held against the exterior of the band by a fixed guide 191.

The opposite, outer end of the rod 190 is enlarged, as at 190, and fitted to another clamp ring 192. having lugs 193, and a clamp screw 19%, so the ring can be secured to the angularly turned. outer front portion of the arm, adjacent to the head 17.

A brush 196 contained, in a holder 197, is secured to the ring by an adjusting screw 198, the brush being adapted to travel in advance of the needle 18.

Motion is communicated to the rod 190, which partakes of the functions of a lever, being slidably fulcrumed in the guide 191, by the following means:

Formed at a right angle, integrally with the extension 185, is a bar 200, pivoted to a link 201, in turn pivoted to a link 202 secured to part 68 of arm 70. The link 205 is pivoted at 206, and connected with the angular element 208, of the lever 188, so as to convey motion to it when the lever is operated. I

Pivoted to the lever 205 is a link 210, in

turn pivoted to extension 212 of the lever 68.

In the operation, the parts being assembled in the position indicated in the Fig. 1, the plate 32 and its engaged elements being secured to the disk support 22, and the clamp bands 180 and 192 secured on the tone arm, the instrument is ready to play, in the ordinary manner.

By reason of the sleeve or collar 28 being engaged with the hub of the record support plate, it will obviously rotate and move the parts, by consecutive contactwith the cam, during three rotations, advancing the same step by step into an operative condition, after which the parts remain in the position shown in Fig. 12 until the end of the record groove has been reached.

eral levers, returns the sound box and needle to their original position, ready for further playing.

It is not the intention of the invention to lift the entire tone am. The brush 196, upon the operation of the levers 202 and 212 by the intermediary of the lever connections shown in Figs. 10, 11 and 12 simply tends to lift the sound box and the needle about g" above the record plate and then swings the arm out.

Repetition is accomplished broadly by the rotation of a cam 28 which frictionally engages a lever 41 pivoted .at 40 to a carriage or plate 32 which plate 32 is provided concentric the cam bore with a bearing suitably journaled upon a sleeve carrying the cam. A spring 39 urges the lever 41 into frictional engagement with the cam 28 and also performs other functions hereinafter de scribed. The limit of movement of the plate 32, by the frictional engagement, is determined by a stop 171 which may be set at any predetermined position governed by the inner volute of the spiral on the record.

When the stop 171 is reached by a finger 152 on the late, it arrests the movement of the plate 111 that direction and insures'the operation of the cam upon the various members' hereinafter descrlbed and allows the stylus to drop into the volutes of the spiralon the record. The tone arm moves with the plate but in a reverse direction. That is to say, when the plate 32 moves in a clockwise Y direction upon its axis it moves the tone arm in a counter-clockwise direction and when the tone arm, by engagement of the stylus in the volutes of the record spiral, moves in a clockwise direction, it moves the plate in a counter-clockwise direction.

Thus the plate moves the tone arm in one direction and the tone arm moves the plate in the reverse direction. Automatically the stylus is lifted at the end of the clockwise movement of the plate and automatically it is released at the end of the clockwise movement of the plate so that gravity will lowe it. The automatic mechanism for accomplishing this lift and release is as follows: Where agooseneck is carried by the tone arm, a clam 192 is afiix'ed to the goose neck co-axial with the pivot of the goose "lever turns on its axis on the neck and a lever 190 is pivotally mounted to the goose neck beside the clamp. The clamp 192 is provided with an ad'ustable abutment for engaging a portion of t e lever which abutment is in the form of a screw 198, the adjustment of which screw determines the range of drop and lift of the stylus. That is to say, when the lever 190 is pulled downward by a linkage 189, the oose neck and by engaging screw 198, lifts -t at side of the clamp upon the axis of the goose neck and raises the goose neck and stylus from the record and when the lever 198 is released to move upward, the weight of the goose neck and elements carried by it will lift the lever and allow the stylus to lower.

The link 189 is pivoted to a bell-crank 188, the bell-crank being provided with a slot in the lower arm for receiving a lever 205 which is pivoted at 206 to a bar 200 of a lazy-tong which links the plate 32 with the tone arm, the lazy-tong comprising two bars, namely, 200 and 201, the bar 201 being pivoted to a finger 202 from the plate 32 and the bar 200 being bent upward into a standard 185, the top of which standard is formed into a clamp 180 for the tone arm and is also formed into ears 182 for a clamping screw 181. The standard is also provided with a unitary guide 191 for the lever 190. I

The clamp 180 being made rigid to the tone arm, the bar.200 will move parallel with the arm but underneath the record and the standard 185 will be beyond the periphery of the record. Thus when the tone arm and bar 200 move clockwise, the bar 200 will push upon bar 201 and move the plate 32.

rection to accomplish this lifting of the stylus by a pusher 78 pivoted at .79 to the plate 32 which pusher is urged by a spring 86 to push thedetent 68 in a counter-clockwise direction, the limit of which movement is determined by a stop 76 formed unitary from the plate 32. Thus when the pusher 7 8 is released, the detent 68. will be held by the ressure of spring 86 firmly-against the stop 6 and the stylus will be carried in an elevated position which position is illustrated in Fig. 6. -When, however the pusher is moved in a counter-clockwise direction to the position shown in Figs. 11 and 12, the detent will be released to be gravitated by the goose neck except as limited by fingers 72 and 74. The pusher 78 is detained in position at the limit of its counter-clockwise movement by a detent or tooth 95 engaging in a recess 96 and the pusher is moved in a counter-clockwise direction against the pressure of spring 86 by a pawl 47 which pawl is pivotally mounted at 48 to the lever 41 so that when the lever 41 moves clockwise upon the pivot 40, the pawl 47, if engaged in recess 47 will pull the pusher out of the way of the detent 68 to the position where it will be locked by the tooth 95 to be thereafter tripped or released. The awl 47 is kept from entering the recess 47 except at predetermined times, by an obturator 84 and a latch 59. The obturator 84 is pivoted at 83 to the pusher 78 and normally held to close the recess 47' by a spring 85 and is withdrawn against the pressure of spring 85 by a wire 142 which wire is pulled by a lever 141 moved by teeth 125 afiixed to a ratchet 128 at every alternate tooth. The ratchet 128 is urged to rotate by a pawl 136 yieldingly held against it by a spring 137 and is prevented from backward rotation by a spring detent 130. The pawl 136 is urged to rotate the ratchet in turn by the clockwise movement of lever 41, and owing to the relative spacing of the teeth on the ratchet to the teeth 125, two forward movements of the pawl 136 are necessary to move the wire 142. A finger 119 is operated byteeth 125 in a counter-clockwise movement upon a pivot 120. Said lever operates a wire 122 and also a crank 114 clockwise by engagement with a lug 115, the crank being pivoted at 110 and returned by a spring 116. The crank is held at the limit of its counter-clockwise movement by a latch 63 engaging a tooth 58' which latch is urged into engagement with the tooth by a spring 64 and is withdrawn from engagement by the wire 122. The

counter-clockwise movement of the crank 91, which latches the pusher 78, is prevented by the engagement of a tooth 100 on crank 114 into a recess 100 on the arm 98 of the crank 6. When, however, lever 1-19 is moved counter-clockwise by a tooth 125, it releases,

the tooth 100 so that the pusher 7 8 may be locked by the tooth 95 in recess 96. When on the other hand, the lever 91 is movedby spring 51 counter-clockwise to its limit and is holding the pusher 78 locked, it is held in that position by spring 51 which is pivoted at 52 and engages beyond its pivot with a lug 50 on the lever 41. The spring 51, when the lever 41 is at limit of clockwise movement, pushes against a lug 51, as shown in'Fig. 11, but when the lever is in the position shown in Fig. 10, the spring 51 does not bear upon the lug 51. The spring 51 is also released from bearing upon the lug 51 a lift 102 pivoted at 108 and extending on the position.

aaaier opposite side of its pivot into a finger 107. The finger 107 is adapted to engage an adj ustable stop 167 when the plate 32 has reached the predetermined limit of its counter-clockwise movement. The result of this engagement is to move the finger 107 clockwise upon its pivot until it has lifted and released the spring 51 and also until the finger 107 has engaged a lug 106 upon the arm 98 with suflicient pressure to move the tooth 95 from holding the pusher 78. Thus when the finger 107 has engaged with the stop 167, the spring 86 automatically lifts the stylus from the record by urging the mechanism heretofore described. At the same time, it automatically releases the lever 41 so that it may frictionally engage the cam 28 as at 42. The release of the lever 41 is accomplished as well by the removal of the tooth 95 which tooth is of sufiicient thickness to extend the thickness of the pusher 78 and lever 41, the lever 41 being provided with a shoulder or tooth registering with recess 96, so that when the pusher 78 is locked in the limit of counter-clockwise movement, the lever 41 is locked at its limit of clockwise movement. The lever 41 is held from lifting off the plate 32 by a guide 43. The detent 68 is held from clockwise movement when the tooth 95 is out'by a pawl 74 urged by a spring 77 and engaging a tooth 73, which pawl is released by the engagement of a finger 93 within a recess in arm 91. Thus when the record has ceased playing, the finger 107 trips the pusher 78 and the lever 41, so that both assume the position shown in Fig. 10, in which the pawl 74 is in. the path of detent 68, the usher 78 is against the detent 68, and the nger 72 is clear of the detent 68 and the crank 55 is out of the path of cam 28.

On the first revolution of the cam 28, at the start of the revolution, its friction against lever 41 causes'it to turn the plate 32 so that the finger 107 assumes its normal The first revolution of the cam merely turns ratchet 128 a single tooth and removes obturator 84 by pulling on wire 142 so that the pawl 47 engages recess 47 The second revolution pulls pusher 78 in a counter-clockwise direction and looks it by tooth 95 which also looks lever 41 from the path of the cam, releases detent 63 by pulling wire 122 allowing the spring 61 to cause finger 72 to restrain detent 68 and bring the face 57 in the path of the cam and at the same time releasing pawl 74 and tensioning spring 51. The position of parts after the second revolution is shown in Fig. 11.

path of the cam 28 until the end of the record is reached and the trip 107 operates.

It will be seen from the foregoing that a repeater is provided which is adjustable to varying sized records, that is wholly beneath the record in its essential elements and admits of the record being changed without disturbing the repeater, that is positive in its locking mechanism whereby it is inapt to get out of order and that quickly lifts the stylus at the proper time but gradually lowers the stylus to protect the record, and at the same time accomplishes all the other desired results.

Claims:

1. In a repeating phonograph, atone arm, a stylus, a record shaft revoluble on a vertical axis, a cam revoluble with the shaft below the record, a carriage co-axial with the shaft, means mounted on the carriage adapted to engage the cam whereby the cam will move the carriage to a predetermined position and adapted to automatically clear the path of the cam upon the limit of a predetermined movement of the cam and means interconnecting the carriage and tone arm whereby upon the movement of the carriage the tone arm will be moved outwardly and means for automatically lowering the stylus at the limit of said outward movement of the tone arm and for lifting the stylus at the limit of the inward movement of the tone arm.

2. In a repeating phonograph, a tone arm, a stylus, a record shaft, a cam mounted on the record shaft, a carriage co-axial with the record shaft, means interconnecting the carriage and tone arm whereby the movement of one moves the other, means connected to the carriage and to the tone arm for lifting and lowering the stylus at predetermined positions of the tone arm, a lever mounted on the carriage and yieldingly held against the cam, a detent mounted on the carriage and adapted to raise the stylus, a pusher adapted to engage the detent and prevent the premature lowering of the stylus and to raise the stylus by pushing the detent, a pressure member adapted to provide a gradual movement of the detent when the pusher is withdrawn from the detent, and means whereby upon the first rotation of the cam the pusher is prepared for movement and whereby upon the second r0- tation of the cam the pusher is removed from the detent.

3. An attachment for a phonograph having a vertical shaft and a tone arm movable horizontally comprising a carriage adapted to be inserted around the shaft beneath the record and to be interconnected with the tone arm and means whereby upon the rotation of the shaft the carriage will be fric' tionally carried by the shaft and carry with it the tone arm until a predetermined position has been reached, the frictional engagement also operating in one revolution of the shaft to set a spring for lifting the stylus at the termination of the cycle of the carriage and in another revolution for lowering thestylus.

In testimony whereof I have afiixed my signature.

JOSEPH A. DAVIDOWSKI. 

